Vue 3 and TypeScript: Advanced Patterns

Integrating TypeScript with Vue 3 can greatly improve the maintainability and robustness of your applications. Using advanced patterns like type-safe components and generics can make your code more predictable and error-resistant.

Setting Up Type-Safe Components

To make your Vue components type-safe, define the props with TypeScript interfaces.

Example:

<script lang="ts" setup>
import { defineProps } from 'vue';

interface User {
  name: string;
  age: number;
}

const props = defineProps<{ user: User }>();
</script>

<template>
  <div>{{ user.name }} is {{ user.age }} years old.</div>
</template>

Using Generics for Flexibility

Generics allow you to create reusable functions and components.

Example:

function useArray<T>(items: T[]): T[] {
  return [...items];
}

const numbers = useArray<number>([1, 2, 3]);
const strings = useArray<string>(['a', 'b', 'c']);

Utility Types in Vue Components

TypeScript utility types like Partial, Pick, and Omit can simplify prop definitions.

interface Product {
  id: number;
  name: string;
  price: number;
}

type ProductPreview = Pick<Product, 'name' | 'price'>;

Why Use It:

• Strong type safety for props and data.
• Easier to catch errors during development.
• More predictable code structure.